Forwarded: Re: [syzbot] [block?] BUG: unable to handle kernel paging request in blk_mq_complete_request_remote

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Subject: Re: [syzbot] [block?] BUG: unable to handle kernel paging request in blk_mq_complete_request_remote
Author: nenkov2004@xxxxxxxxx

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -538,6 +538,8 @@ bool nvme_cancel_request(struct request *req, void *data)
 	if (blk_mq_rq_state(req) != MQ_RQ_IN_FLIGHT)
 		return true;

+	if (!(nvme_req(req)->ctrl->quirks & NVME_QUIRK_SKIP_CID_GEN))
+		nvme_req(req)->genctr++;
 	nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD;
 	nvme_req(req)->flags |= NVME_REQ_CANCELLED;
 	blk_mq_complete_request(req);